}

        @Override
        public Object setUserData(String key, Object data, org.w3c.dom.UserDataHandler handler) {
            return null;
        }

        @Override
        public Object getUserData(String key) {
            return null;
        }

        @Override
        public void setNodeValue(String nodeValue) {
            this.nodeValue = nodeValue;
        }

        @Override

        }
    }

    @Override
    @SuppressWarnings("unchecked")
    public void execute(ViolationCheckContext context) {
        Map<String, Object> userData = (Map<String, Object>) context.getUserData();
        userData.put("acceptedApiChanges", acceptedApiChanges);
        userData.put("seenApiChanges", new HashSet<ApiChange>());
    }

        Map<AccessorKey, UpgradedProperty> currentAccessors = context.getUserData(CURRENT_ACCESSORS_OF_UPGRADED_PROPERTIES);
        Map<AccessorKey, ReplacedAccessor> oldRemovedAccessors = context.getUserData(OLD_REMOVED_ACCESSORS_OF_UPGRADED_PROPERTIES);

        if (violation.getHumanExplanation().startsWith(SINCE_ERROR_MESSAGE)) {